Radiance output and temperature controlled LED radiance source

Details Radiance output and temperature controlled LED radiance source Radiance output and temperature controlled LED radiance source

2005-06-03

2009-12-08

Negron, Ismael (Department: 2885)

Illumination

Plural light sources

Particular wavelength

C362S294000, C362S373000, C315S151000, C315S158000, C250S205000, C250S552000, C250S553000, C374S002000

Reexamination Certificate

active

07628507

ABSTRACT:
The LED-radiance source is a suitable replacement of lamp-based integrating sphere sources where they are used as stable and uniform radiance sources. The LED-based radiance source includes an array of LEDs having substantially similar radiance output wavelengths and a radiation detector such as a photodiode that detects and monitors radiation directed from the LEDs. Temperature of the LEDs can be controlled by feedback from a photodiode, thereby allowing for control and stabilization of temperature-dependent radiation output.

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